Transmission-gearing for traction-engines.



H. 0. CLAY. TRANSMISSION GEARING FOR TRACTION ENGINES.

APPLICATION FILED JUNE 11, 1912.

Patented July 8, 1913.

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M w 2 m 0 C 7% r 4 m W ZZZ H. O; CLAY. TRANSMISSION GEARING FOR TRACTION ENGINES. APPLICATION FILED JUNE 11, 1912.

GHQ M101 Patented July 8, 1913.

2 SHEETS-SHEET 2.

4 UNITED STATES PATENT OFFICE.

HARRY C. CLAY, OF COLUMBUS, INDIANA, ASSIGNOB TO EMERSON-BRANTINGHAM COMPANY, 01 ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.

TRANSMISSION-GE'ARING FOR TRACTION-ENGINES.

To. all whom it may concern Be it known that -I, HARRY C. CLAY, a citizen of the United States, residing at Columbus, in the county of Bartholomew and State of Indiana, have invented a new and useful Transmission-Gearing for Traction-Engines of which the following is a specification.

It is the object of this invention to provide a transmission and reversing gearing particularly for use in traction engines, which is at once simple and inexpensive, which is safe-guarded against improper operation, and which is always capable of proper operation. To this end I have provided a driving gear and a driven gear, one of which is movable axially into and out of mesh with the other,

tially the same time.

and a third gear which may be moved transversely of its axis into mesh with the first two gears only when the latter are not in mesh with each other, the third ear being mounted so that it begins to mesh with the driving gear before it begins to mesh wit-h the driven gear, but gets into full meshing engagement with said two gears at substan- In the accompanying drawings, which illustrate my invention, Figure 1 is a side elevation, partly in section on the line 1-1 of Fig. 2, of my improved transmission and reversing gear mounted on a traction engine, only a fragment of the latter being shown; Fig. 2 is a plan view of the gear shown in Fig. 1, some of the parts being in section; and Fi 3 is a front elevation of the gear shown in Fig. 1, some of the parts being in section. A

The tractor frame 10 is rovided with the usual rear driving whose 11, which are driven by an engine 12,-the shaft 13 of yvhich is connected by my improved transm ssion' and reversing gearing to a countersha t 14, pinions 15 on which drive gears 16 on the traction wheels. The transmission and re versing gearing comprises a driven; gear wheel 20 on the countershaft 14, a driving pinion 21 axially slidable on a square sleeve 22 looseon the shaft 13, and a pinion 23 mounted on a spindle 24 extending between a pair of pivoted arms 25 having a common hub. The sleeve 22 may be connected to the shaft 13 by means of a clutch 26, with the outer surface of which a brake shoe'40 carried by the clutch operating arm 41 may cooperate to hold the pinion 21 from moving Specification of Letters Patent.

Application filed June 11, 1912.

Patented July 8, 1913.,

Serial No. 703,061.

when the clutch is open. The'pinion 21 is rooved at one end to receive a rin which fits loosely in such groove an operates with a yok 28 whereby the pinion 21 may. be shifted axially along the square sleeve 22 int-o and out of mesh with the gear 20. To facilitate themeshing of the teeth of the pinion 21 and gear 20, such teeth 'are preferably tapered on their ends which engage first as they are shiftedinto meshing engagement. The outer diameter of the ring 27 is slightly greater than the outer diameter of the pinion 21, so that when the pinion 21 and gear 20 are in engagement the pinion 23 cannot be shifted into engagement therewith. The ring 27 also prevents the pinion 21 frombeing shifted into mesh with the gear 20 when they are in mesh with the pinion 23. The pin 29, on which the arms 25 are pivoted, is so located that when the pinion 23 and arms 25 are shifted toward the pinion 21 and gear 20 by the operating handle 30 and the link and level" mechanism 31, the pinion 23 begins to mesh locating the pin 29 so that the line connecting its axis with that of the spindle 24:

forms with the line joining the axis of the pin 29 and that of the gear 20 an angle of which the cosine varies much more rapidly as the arms 25 are-moved than does the cosine of the angle between the first of theaforesaid lines and the line joining the axis of the pin 29 and that of the shaft 21; in.

other words, the first angle is much nearer a right angle than the second.

As a result of this construction, the engine may be operated slowly as the pinion 23 is moved into mesh with its cooperating gears, such rotation first turning the driving pinion 21 slowly on its axis to permit proper meshing between the two pinions 21 and 23, and then turning the latter pinion slowly to permit proper meshing between the pinion 23 and.the driven gear 20. Thus alldifiicult from the striking of crowns of they teet of one gear against those of another to prevent meshing is avoided.

I claim as my invention:

1. A transmission and reversing comprising the combination of a driving gear and a driven gear one of which is mov- 10 comprising the combination of a drivingv able axiallv into and out of mesh with thecom risin two 'ears one of which is axiother. a third gear which is movable transversely of its axis into and out of mesh with the first two gears, and means movable with f the axially movable 5; *ar for preventing the third gea r from being moved into mesh with said first two gears when the latter are in engagementwith eaeh other. I

2. A transmission and reversing gearing,

gear and a drivengear one of whieh is movable axially into and out. of mesh with the other, a third gear which is movable transversely of its axis lnto and out of mesh with 15 the first two gears. and means movable with the axially movable gear .for preventing the third gear from being moved into mesh with said first two gears when the latter are in engagon'ient with each other, and for preventing said first two gears from being moved into mesh with each other when they are in mesh with the third gear.

A transmission and reversing gearing, comprising two gears, one of whit-h is axially movable into and out ofnresh with the other, a third gear movable transversely of its axis-into and out of mesh with the first two gears, and a ring carried by said axially movable gear {or blocking the path of the third gear into mesh with the first two gears when the latter are 'm-mesh with each other.

t. A transmission and reversing gearing,

ally m vable into and. out of mesh with the other, a third gear movable transversely of its axis into and out of mesh with the first two gears, and a ringearried by said axially movable gear for blocking the path of that third gear into mesh with the first two when the latter are in mesh with each other, and for preventing said first two gears from beingmoved into mesh with each other when they are in mesh with the third gear.

5. A transmission and reversing gearing, comprising two gears, one of which is axially movable into and out of mesh with the other, a third gear movabletransversely of its axis into and out of meshwith the first. two gears, and a ring carried by said axially movable gear for engaging the side ofsaid. third gear when the latter is in mesh with the first two gears and said first two gears are attempted to be moved into mesh with each other, thus preventing such movement atsuch time.

in witness whereof, I have hereunto set my hand and seal at Columbus, lndiana, 'this fllst. day of May. A. D. one thousand nine lundred and twelve.

HARRYC. oLav. 1.5. \Vitnesses:

ARTHUR H. STAIILIIUTH, PERRY KING. 

